/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package utils

import (
	"fmt"
	"strings"
)

// MultiError is a Wrapper for multiple Errors
type MultiError struct {
	// MainError denotes the error which summarize the error
	MainError error
	// Errors are the child errors
	Errors []error
}

func (m MultiError) Error() string {
	mainErrorText := "Child errors:\n"
	if m.MainError != nil {
		mainErrorText = fmt.Sprintf("Main Error: %v\nChild errors:\n", m.MainError)
	}
	return mainErrorText + strings.Join(func(errors []error) []string {
		result := make([]string, len(errors))
		for i, errorElement := range errors {
			result[i] = errorElement.Error()
		}
		return result
	}(m.Errors), "\n")
}
